Operation 19
Every Sleeper league you're in, in one console. Nothing stored.
What it is
Operation 19 is a command console for people who run a stack of fantasy leagues on Sleeper. You put in your Sleeper username, every league you're in loads into one place, and you open the Command Center to see them together. It's a portfolio view for the manager who treats fantasy football like a season-long operation, not a single team.
Why it exists
Sleeper is built around one league at a time. If you're in eight of them, keeping the whole picture straight means tapping between eight separate views: eight sets of matchups, eight waiver runs, eight rosters. Operation 19 pulls them onto one board so you can read the whole slate at a glance instead of in sequence.
What got built
A single-page console with a look to match the name: dark, lit up, built to read like a command center rather than a spreadsheet. You start from your username, your leagues load in, and the Command Center lays them out side by side.
The part I'm proudest of: nothing is stored
Operation 19 never receives, stores, or logs your username or your league data. Your browser asks Sleeper's public API for it directly, the data lands on your screen, and that's the end of it. No account, no server holding your information, nothing that can leak. For a tool you hand your Sleeper identity to, that's the honest way to build it. It also means the whole thing runs as a static front end, which keeps it fast and cheap to host.
The honest footnotes
Operation 19 isn't affiliated with Sleeper. It reads from Sleeper's public API, the same data the app already shows you, just arranged for someone running more than one league at once.